| # | Company | Employees |
|---|---|---|
| 1 |
IU International University of Applied Sciencesiu.de
Offers diverse higher education programs across various fields, including distance learning, dual studies, and online self-study with campus options, serving over 130,000 students. |
6,829 |
| 2 |
ZEISS Medical Technologyzeiss.com
This company focuses on advancing medical technology with a special focus on ophthalmology, ophthalmic surgery, visualization systems, dental treatment, and gynecology |
4,883 |
| 3 |
Friedrich Schiller University Jenauni-jena.de
A historic university in Jena, Germany with a focus on optics, glass manufacture, biotechnology, and a range of technological areas |
2,902 |
| 4 |
ZEISS Microscopyzeiss.com
A leading manufacturer of microscopes offering light, electron/ion, optical sectioning, and X-ray microscopes for life sciences, materials research, and industry markets |
2,017 |
| 5 |
JENOPTIKjenoptik.com
Innovative photonics company creating solutions for various industries worldwide, emphasizing sustainability, diversity, and exploration of new technologies to make a difference |
1,815 |
| 6 | 1,624 | |
| 7 |
Universitätsklinikum Jenauniklinikum-jena.de
A leading university hospital in Thuringia with over 200 years of history, providing medical care to patients, education to students, and research opportunities for scientists |
1,369 |
| 8 |
Technische Universität Ilmenautu-ilmenau.de
A research-focused university offering high-quality interdisciplinary education, innovative research in engineering, IT, economics, mathematics, and natural sciences, leading to excellent career prospects |
1,162 |
| 9 |
Bauhaus-Universität Weimaruni-weimar.de
An interdisciplinary university in Weimar continuing the legacy of the Bauhaus, offering degree programs in architecture, design, engineering, and media |
859 |
| 10 |
Universität Erfurtuni-erfurt.de
A reputable university in Erfurt, Germany known for its focus on culture, social sciences, and education, offering diverse interdisciplinary programs and research opportunities |
691 |
| 11 |
TEAG Thüringer Energie AGthueringerenergie.de
Leading energy service provider in Thuringia, supplying electricity, gas, broadband, and district heating to 500k+ customers, offering various job opportunities and professional training |
676 |
| 12 |
IU International University of Applied Sciencesiu.org
Offering accredited higher education programmes worldwide with flexible study options, affordable tuition, and multiple scholarship opportunities, whether online or on-site |
633 |
| 13 |
Freistaat Thüringenthueringen.de
Management of internal security, emergency services, police coordination, disaster response, and municipal support within the Thuringia region. |
556 |
| 14 |
Bauerfeind AGbauerfeind.com
The company specializes in high-quality, effective, and comfortable products such as supports, orthoses, compression stockings, and orthopedic orthoses, with a focus on attractive design |
546 |
| 15 |
Analytik Jenaanalytik-jena.com
Global leader in analytical measurement technology for molecular biology, liquid handling, and automation Provides solutions for various industries with precision, reliability, and comprehensive service |
531 |
| 16 |
Ernst-Abbe-Hochschule Jenaeah-jena.de
In Jena, a diverse university offers practice-oriented education in technology, economics, social sciences, and health, promoting interdisciplinary collaboration |
436 |
| 17 |
zollsoft GmbHzollsoft.de
An innovative family-owned company offering a rapid-growing Apple-based software for medical practices, with a focus on creativity, growth, and team collaboration |
409 |
| 18 |
ComTS GmbHcomts.de
Specializing in processing and optimizing back-office processes for a major bank, offering diverse career opportunities with individual development paths #strongteamplayer |
406 |
| 19 |
Fachhochschule Erfurtfh-erfurt.de
Provides applied scientific education through compact Bachelor and Master programs, combining academic knowledge with practical professional training opportunities. |
395 |
| 20 |
dotSource SEdotsource.de
dotSource develops scalable digital products for marketing, sales, and services through strategy consulting, technology selection, and agile methodologies Trusted by top companies |
330 |
| 21 |
Intershop Communicationsintershop.com
Provides cloud-based e-commerce platform enabling manufacturers and wholesalers to digitalize operations, enhance customer experience, and increase online revenue globally. |
282 |
| 22 |
Stadtverwaltung Erfurterfurt.de
Provides information and updates about city administration activities, focusing on public relations and communication with residents and media. |
259 |
| 23 |
Auto Bierschneiderbierschneider.de
With a focus on "People and Cars" since 2004, this company values technology, authenticity, competent advice, quality, customer satisfaction, and innovation for the future |
215 |
| 24 |
Kolibri360kolibri360.de
Leading logistics service provider offering comprehensive fulfillment solutions from warehousing to shipping and returns for businesses of all sizes. |
211 |
| 25 |
Leibniz Institute on Aging - Fritz Lipmann Institute (FLI)leibniz-fli.de
A research institute in Jena focused on studying genetic and environmental factors influencing aging, aiming to discover therapies for age-related diseases |
182 |
| 26 |
KiKA von ARD und ZDFkika.de
KiKA is a joint offering of public broadcasters ARD and ZDF, providing ad-free and age-appropriate content for children aged 3-13 since 1997 |
178 |
| 27 |
ae groupae-group.de
An innovative automotive supplier specializing in high-tech light metal castings, machining parts, and finished components to shape innovation |
175 |
| 28 |
SRH Wald-Klinikum Gerawaldklinikumgera.de
A modern maximum care hospital with 1000 beds, offering a full range of medical services and part of a leading provider of education and healthcare services |
173 |
| 29 | 172 | |
| 30 |
Pollmeier Massivholzpollmeier.com
A global supplier of beech lumber, solid wood components, and laminated veneer lumber for construction, furniture, and door industries Committed to sustainability |
169 |
| 31 |
Böttcher AGbueromarkt-ag.de
Leading German online retailer with over 6 million customers, offering 150,000 products including office, multimedia, cleaning, and storage supplies. |
169 |
| 32 |
TÜV Thüringentuev-thueringen.de
The company based in Germany focuses on providing quality, safety, and sustainability through a wide range of services, from training to certification, for various industries worldwide |
168 |
| 33 |
Max Planck Institute for Biogeochemistrybgc-jena.mpg.de
This company conducts research on global biogeochemical cycles to understand how living organisms interact with the environment and impact ecosystems and climate |
167 |
| 34 |
Saller Groupsaller-bau.com
The company is an international real estate holding company specializing in developing, constructing, leasing, and maintaining commercial properties like shopping centers and retail parks |
165 |
| 35 |
Sparkasse Mittelthüringensparkasse-mittelthueringen.de
Leading Sparkasse in Thuringia, offering financial services to individuals, businesses, and organizations with a focus on customer proximity and regional connection |
162 |
| 36 |
Funkwerk AGfunkwerk.com
A technology group specializing in railway industry and public transport solutions, including communication systems, passenger information, and security systems Made in Germany! |
159 |
| 37 |
DOCTER OPTICS SEdocteroptics.com
The company is a leading supplier of optical components and systems for automotive, biometrics, digital projection, printing, and machine vision industries |
153 |
| 38 |
TEN Thüringer Energienetze GmbH & CO. KGthueringer-energienetze.com
The company is the largest distributor of electricity and natural gas in Thuringia, providing services for energy supply, connections, and promoting the energy transition |
152 |
| 39 |
Cuculuscuculus.com
Provider of software solutions for energy sector and beyond, offering in-house installations or cloud services Specialized in IoT platform for device control and data processing |
150 |
| 40 |
Ramederrameder.de
A leading wholesale distributor of automotive carrier products in Germany, Austria, and Poland, offering a wide range of quality products with high availability for garages and end consumers |
146 |
| 41 |
Maximator GmbHmaximator.de
The company specializes in developing, manufacturing, and servicing a wide range of high-pressure components, systems, and testing services with a certified quality management system |
146 |
| 42 |
Thüringer Aufbaubankaufbaubank.de
This organization, established in 1992, serves as a development bank for the state of Thuringia, providing support in various areas such as economics, agriculture, and housing |
146 |
| 43 |
Jena-Optronik GmbHjena-optronik.de
This company specializes in developing visionary technology for leading-edge space missions, focusing on satellite communication, navigation, Earth observation, and stabilizing spacecrafts |
117 |
| 44 |
Contemporary Amperex Technology Thuringia GmbHcatl.com
A global leader in lithium-ion battery manufacturing for electric vehicles, focusing on innovative new energy technologies and creating sustainable solutions |
108 |
| 45 | 80 | |
| 46 |
Kreissparkasse Eichsfeldkreissparkasse-eichsfeld.de
A public institution providing financial services for over 185 years, with a focus on serving the Eichsfeld region through community responsibility and customer proximity |
67 |
| 47 |
Sparkasse Arnstadt-Ilmenauspk-arnstadt-ilmenau.de
A modern financial institution offering savings, financing, securities trading, and insurance services with a strong market presence in the Ilm district |
57 |
| 48 |
Autohaus Peter Gruppeautohauspeter.de
An automotive company located in Nordhausen, Germany that specializes in selling cars and providing automotive services |
52 |
| 49 |
Betterspace GmbHbetterspace360.com
Betterspace develops smart software solutions for energy efficiency, building management, and digital guest services, creating connected, sustainable, efficient places for customers |
50 |
| 50 |
Active Fiber Systems GmbHafs-jena.de
A technological leader in high-power femtosecond laser systems, offering compact to complex solutions based on fiber amplifier technology for scientific and industrial applications |
49 |
| 51 |
Spleenlabspleenlab.ai
Next-generation AI perception software for autonomous systems. Solutions for air, ground, and maritime domains. Real-time, reliable, precise environmental understanding. |
48 |
| 52 |
CFF GmbH & Co. KGcff.de
Global manufacturer of natural cellulose fibers for various industries, using innovative technologies and renewable raw materials to create high-quality, customizable solutions |
47 |
| 53 |
bluechemGROUPbluechemgroup.com
The company develops environmentally-friendly products, high-quality services, and innovative concepts for workshops and industries worldwide, focusing on customer satisfaction and market trends |
46 |
| 54 |
MEGGLE Bakery GmbHmeggle-bakery.com
A subsidiary specializing in producing frozen and chilled bakery products with over 200 million baked goods annually, trusted by customers nationwide |
41 |
| 55 |
plazz AGpolario.app
Specializing in digital SaaS solutions for internal and external communication, offering modular solutions for team collaboration, events, onboarding, and more with a focus on design, usability, IT-security, and data protection |
39 |
| 56 |
Marquardt Küchenmarquardt-kuchen.nl
A company founded in 1991 offers affordable quality kitchens with granite, sold at factory prices from their own showrooms in Germany and the Netherlands |
35 |
| 57 |
ORISA Software GmbHorisa.de
It develops innovative configure price quote software for customized solutions in engineering, automobile, and automation industries, focusing on client needs. |
33 |
| 58 |
ASKION Biobankingaskion-biobanking.com
This company specializes in providing high-performance cryo/biobank solutions with modular, automated, and expandable systems for sample storage and freezing at ultra-low temperatures |
32 |
| 59 |
Volksbank eG Gera • Jena • Rudolstadtvolksbank-vor-ort.de
The company is a cooperative bank dedicated to its customers and members, focused on helping them achieve their goals |
30 |
| 60 |
PWG Profilrollen-Werkzeugbau GmbHneuman.at
A German automotive company specializing in the production of profile rolling tools, located in Bavaria |
28 |
| 61 |
EDAG Werkzeug + Karosserie GmbHedag.de
An automotive company based in Eisenach, Germany specializing in tools and bodywork services |
28 |
| 62 |
Lay Gewürze GmbHlay-gewuerze.de
The company offers high-quality spice mixes, processing aids, and food products for the meat industry, general food industry, catering/trade, focusing on quality, taste, and customer success |
28 |
| 63 |
EQUIcon Software GmbH Jenaequicon.de
A software company founded in 1992, specializing in equipment control solutions for industry and logistics sectors, with a focus on sustainable growth and client collaboration |
26 |
| 64 |
Quantum Optics Jena GmbHqo-jena.com
Specializing in quantum technology, the company focuses on advanced photon sources and quantum optical systems for enhanced data security and information processing |
26 |
| 65 |
Kontinent Spedition GmbHkontinent-spedition.de
Global transport logistics provider offering professional packaging, storage, and supply management services to clients worldwide |
25 |
| 66 |
HAMMEL Recyclingtechnik GmbHhammel.de
A leading manufacturer in Germany specializing in shredding, screening, and sorting equipment for recycling wood, waste, and metal materials worldwide |
25 |
| 67 |
Navimatix GmbHnavimatix.de
Innovative software development company focusing on IoT, cloud computing, mobile apps, and DevOps for various industries like automotive, healthcare, and more |
25 |
| 68 |
AXTHELM + ZUFALL GmbH & Co. KGzufall.de
The company operates a handling warehouse and logistics centers in Nohra, offering various logistics services for transport and contract logistics |
20 |
| 69 |
TAF mobile GmbHtafmobile.de
A leading software service provider for public transport, specializing in digital ticketing and mobility platforms, serving various transportation companies and promoting sustainable transportation options |
20 |
| 70 |
Flughafen Erfurt GmbHedde.aero
The company operates an international airport in Thuringia, Germany with state-of-the-art facilities, low operating costs, and easy access to major cities |
16 |
| 71 |
Bio-Seehotel Zeulenrodabio-seehotel-zeulenroda.de
A lakeside hotel offering 174 rooms, panoramic dining, lakeside beer garden, event spaces for up to 500 guests, 13 meeting rooms, high ropes course, and a 1,600m² spa |
15 |
| 72 |
GAT German Automotive Technologygat-international.de
A German manufacturer of automotive service and maintenance products Specializing in additives & system cleaners for various vehicle circuits & systems |
15 |
| 73 |
WIDEM Logistics GmbHwidem.eu
A successful European company with over 35 years of experience, offering fast and precise deliveries, high quality standards, and efficient logistics processes |
14 |
| 74 |
wunschlösung GmbHwunschloesung.com
An interdisciplinary team creates tailor-made, scalable web applications for business customers using self-developed code generators to automate application development |
14 |
| 75 |
WERKÖ GmbHwerkoe.com
A provider of high-precision standard and customized cutting tools made of HSS and solid carbide, offering efficient solutions for production processes |
13 |
| 76 |
Flamingo Company Groupflamingo-group.de
The company has over 50 years of experience in providing high-quality water treatment and filtration products, with a focus on customer collaboration and product development |
12 |
| 77 |
IROIN® by Stellar Techiroin.io
A company that provides software to simplify and speed up influencer campaign management, offering tools for planning, control, evaluation, and GDPR-ready reporting |
11 |
| 78 |
Erfurter Malzwerke GmbHerfurter-malzwerke.de
Production and supply of high-quality malt for brewing, supporting breweries in creating premium beers worldwide with expert craftsmanship. |
11 |
| 79 |
Dorflebendorfleben.de
The company provides a digital app for villages to centralize information, enhance community identity, visibility, communication, and connection among residents |
11 |
| 80 |
Paatz Viernau GmbHpaatz.com
A century-old German company specializing in precision engineering, offering custom solutions, quality service, and a wide range of machine components and services |
10 |
| 81 |
E-TERRYe-terry.de
Development of a small, cost-efficient, adaptable autonomous robot designed for agricultural use in harsh environments with variable dimensions. |
10 |
| 82 |
Zwerrenz Automatisierungstechnik GmbHzwerrenz.com
A German company specializing in automation technology, located in Thuringia, Germany, providing advanced solutions and services for various industries |
9 |
| 83 |
myGermany GmbHmygermany.com
Comprehensive logistics and fulfillment services enabling global purchase and shipment of German and European products with customs expertise. |
8 |
| 84 |
Heinz Demski Recycling Agentur GmbHdemski-recycling.de
This company offers environmentally friendly solutions for returning used printer consumables tailored to the individual needs of manufacturers, businesses, and private users |
8 |
| 85 |
OptoNet e.V.optonet-jena.de
Representing leading Photonics players in Jena, OptoNet creates a platform for communication, cooperation, talent promotion, and marketing to boost international visibility |
8 |
| 86 |
TREAMS GmbHtreams-gmbh.de
Innovative high-tech company specializing in vacuum system construction, developing fully automatic cleanliness and residual gas measuring devices, and vacuum bake out ovens |
8 |
| 87 |
Thüringer Waldquell Mineralbrunnen GmbHtwq.de
A company with three brands offering over 50 beverages, focusing on sustainability, including mineral water, juices, and soft drinks |
7 |
| 88 |
Mack Logistics GmbHmack-logistics.de
This company offers specialized logistics solutions and value-added services as a subsidiary of Mack & Schühle Group, aiming to provide comprehensive services |
7 |
| 89 | 6 | |
| 90 |
Autohaus Meißner GmbHford-meissner-niedertrebra.de
An automotive company in Thuringia, Germany specializing in vehicle sales, service, and maintenance at Im Dorfe 44A, Niedertrebra |
4 |
| 91 |
Vattenfall Europe New Energy Ecopower GmbHgroup.vattenfall.com
Provides renewable electricity, gas, heating, solar, and e-mobility solutions with a focus on fossil-free, sustainable energy for customers. |
4 |
| 92 |
FHS Fahrzeughandel und Service GmbHfhsgmbh.com
An automotive company located in Thuringia, Germany, specializing in vehicle sales and services at their Zella location |
3 |
| 93 |
TL-Werkzeuge GmbHtl-werkzeuge.de
With over 20 years of experience, this German company provides high-quality standard & special tool solutions with short delivery times and one-stop service |
2 |
| 94 |
Engel Küchenmontagen GmbHkuechenmontage-bundesweit.de
Specialized craftsman with over 19 years of experience in assembling high-quality brand kitchens such as Nobilia, Nolte, Häcker, SieMatic, LEICHT, and Schüller |
2 |
| 95 |
Homecharge GmbHhomecharge.de
Development, manufacturing, and distribution of charging technology and charging services for electric vehicles |
2 |
| 96 |
FarmBlick, Smart Farmingfarmblick.de
Optimization of farming systems through digital tools, enhancing soil fertility, resource use, and supporting farmers in digital transformation. |
2 |
| 97 |
Dudes & Partner | Marktplatz Agenturdudes-partner.com
A leading specialist in scaling E-commerce brands on online marketplaces, offering product optimization, targeted marketing campaigns, and comprehensive portfolio management services |
1 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
The same list elsewhere in Germany
- The largest companies in Germany 13,481
- The largest companies in North Rhine-Westphalia 2,663
- The largest companies in Bavaria 2,566
- The largest companies in Baden-Württemberg 1,960
- The largest companies in Hesse 1,227
- The largest companies in Lower Saxony 785
- The largest companies in Rhineland-Palatinate 389
- The largest companies in Schleswig-Holstein 286
- The largest companies in Saxony 263
- The largest companies in Brandenburg 119
- The largest companies in Berlin 1,475
- The largest companies in Munich 957
- The largest companies in Hamburg 824
- The largest companies in Frankfurt 475
- The largest companies in Cologne 417
- The largest companies in Düsseldorf 307
- The largest companies in Stuttgart 266
- The largest companies in Bremen 177
- The largest companies in Hanover 139
- The largest companies in Bonn 135
- The largest companies in Nuremberg 132
- The largest companies in Karlsruhe 119
- The largest companies in Essen 112
- The largest companies in Mannheim 106